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Recursive record type for DB (#144)

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This commit is contained in:
Janos Dobronszki
2021-06-08 16:03:59 +01:00
committed by GitHub
parent 01380190aa
commit dc4a493805
7 changed files with 171 additions and 89 deletions
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13
db/handler/parse.go
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@@ -10,6 +10,8 @@ import (
)
var quoteEscape = fmt.Sprint(0x10FFFF)
var singleQuoteEscape = fmt.Sprint(0x10FFFE)
var backtickEscape = fmt.Sprint(0x10FFFD)
const (
itemIgnore = iota
@@ -53,6 +55,8 @@ var expressions = []lexer.TokenExpr{
{`>`, itemGreaterThan},
{`[0-9]+`, itemInt},
{`"(?:[^"\\]|\\.)*"`, itemString},
{"`" + `(?:[^"\\]|\\.)*` + "`", itemString},
{`'(?:[^"\\]|\\.)*'`, itemString},
{`[\<\>\!\=\+\-\|\&\*\/A-Za-z][A-Za-z0-9_]*`, itemFieldName},
}
@@ -67,6 +71,9 @@ func Parse(q string) ([]Query, error) {
return nil, errors.New("query contains illegal max rune")
}
q = strings.Replace(q, `""`, quoteEscape, -1)
q = strings.Replace(q, "``", singleQuoteEscape, -1)
q = strings.Replace(q, "''", backtickEscape, -1)
tokens, err := lexer.Lex(q, expressions)
if err != nil {
return nil, err
@@ -102,7 +109,11 @@ func Parse(q string) ([]Query, error) {
if len(token.Text) < 2 {
return nil, fmt.Errorf("string literal too short: '%v'", token.Text)
}
current.Value = strings.Replace(token.Text[1:len(token.Text)-1], quoteEscape, `"`, -1)
to := token.Text[1 : len(token.Text)-1]
to = strings.Replace(to, quoteEscape, `"`, -1)
to = strings.Replace(to, singleQuoteEscape, `'`, -1)
to = strings.Replace(to, backtickEscape, "`", -1)
current.Value = to
case itemBoolTrue:
switch current.Op {
case itemEquals, itemNotEquals: